We have one of the early S P85's, that now has about 88K miles on it.
In March, we purchased an S 100D and traded in my wife's ICE - and she now drivers the S P85 while I drive the S 100D during the week and we use it on the weekend and for road trips (already around 10K miles on it!).
We plan to replace the S P85 with a Model 3, though after driving through high water when evacuating from Harvey a few weeks ago, she's strongly considering delaying delivery until we can get the air suspension, and the ability to increase the vehicle height when driving through high water...
We had planned for two EVs in the house - and have a dedicated 100A circuit for charging. We have an HPWC that was charging at 80A for the S P85 - and had installed a 14-50 outlet on the other side of the garage. When the S 100D arrived, we moved the S P85 over to the 14-50 outlet and dialed it down to 30A for charging. The S100D connects to the HPWC and charges at 48A (we didn't order the high amp charger, which is now standard on newer 100's).
The biggest impact of having two Model S cars in the garage - because there isn't the heat from an ICE, the garage is a little bit cooler - and after we've had rain, the runoff from the cars (when they pull into the garage wet) has a tendency to stay on the garage floor for a while.
It's been nice never having to stop at a gas station...